https://www.callicoder.com/node-js-express-mongodb-restful-crud-api-tutorial/
https://rymc.io/blog/2011/emitting-custom-events-in-node-js/
npm install node server.js
https://www.callicoder.com/node-js-express-mongodb-restful-crud-api-tutorial/
https://rymc.io/blog/2011/emitting-custom-events-in-node-js/
npm install node server.js